Diki,

I was able to disassemble the homegrown FC-7 unit earlier this week, and found that one of my solder joints on the midi connector had worked loose. Cleaned and resoldered, and now switches 1 through 7 work with discrete assignments as before.

So, I'm up and running, but would still like to make another with upgraded switches. Something more like guitar box switch quality, unless I get lucky and find a non-functional FC7 that needs repair!